You need to contact your vendor for a quote. They hold the AMC Record and are the only ones that can sell these licenses. Although Mitel sets a MSRP price for these items, the vendor is not obligated to follow that price and they can charge you whatever you wish. Of course, if it is completely unreasonable, you could always move your AMC record to a different vendor, in a change of AMC record ownership, the winning vendor does have to pay a transfer fee, so expect that cost to be applied to you as well.